REED-MACE FAMILY 



505 



fruits resembling those of S. neglectum, but smaller. — Ditches ; 

 common. — Fl. June — August. Perennial. 



4. S. ndtans (Floating Bur-reed). — A weak, unbranched. 

 floating plant, with very long, grass-green, flat, floating leaves 



spargXnium ERfcTUM {Branched Bur-reed). 



-Lakes 



several staminate heads ; and stalked, long-beaked fruits. 

 rare. — Fl. August. Perennial. 



5. S. minimum (Least Bur-reed). — A more slender form, with 

 pale, pellucid leaves; 1 — 2 staminate heads ; and sessile, short- 

 beaked fruits. — Lakes and ditches ; more commdn. — Fl. July, 

 August. Perennial, 



